Can you guys get Roxul bat insulation in the States? We can get it up here and I wish my entire house had it at least. It's fireproof, sound proof, it doesn't have fiberglass in it, it's made of material that you can touch with your hands because it's made of mineral wool and it's R value is slightly higher then fiberglass. The 2x4 bats are R14 instead of R12 and the 2x6 bats are R22 instead of R19.
www.roxul.com